BugreportManagerTest: adapt to perfetto migration

Dynamically adapt checks based on the value of:
- android.tracing.Flags.perfettoIme()
- android.tracing.Flags.perfettoProtologTracing()

Bug: 276433199
Flag: EXEMPT test fix
Test: atest BugreportManagerTestCases
Change-Id: I81798174db0557cff21920a63d09e846ac30f73e
2 files changed